HN Pro shows you Hacker News the way it was meant to be. If you want splashy animations and an unnecessary coat of paint, HN Pro may not be for you.
But. BUT. If you've learned to love that classic orange and beige and want everything to just "work" like the web app, you've come to the right place.
Browse your stories, reply to comments, upvote, hide, collapse threads, the list goes on. Do everything that you might want to do using your web browser, right in the palm of your hand. If you login with your account, any threads you collapse or stories you hide carry over to your web browser (and vice versa).